@misc{indiciaef98996625bcf,
  title = {Program changes and retention on methadone.},
  author = {J F Maddux and K N Vogtsberger and D P Desmond and M Esquivel},
  doi = {10.1016/0740-5472(93)90063-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/8308944/},
  note = {Source identifier: 8308944}
}